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Model reduction of a load-sensing hydraulic system via activity index analysisHu, Quanyi ...A load-sensing hydraulic system is an energy-saving fluid power transmission that supplies "on-demand" flow at a prescribed pressure margin greater than load pressure. In the paper, based on bond ... graph methodology, a complex and non-linear load-lensing (LS) hydraulic system model is constructed, in which the dynamic behaviours of an LS valve are taken into account. Moreover, a series of experiments are performed to validate the model. Two reduced models based on activity index analysis are obtained to achieve a balance between accuracy and complexity. The results indicate that the system order and computation time can be reduced. By quantifying the relative importance of the elements based on activity index analysis, it shows that the inner leakage of the pump plays a major role in system dynamics due to its correlation to the damping coefficient. Furthermore, the results prove the rationality of representing LS pump dynamics with a fourth-order differential equation and the fact that the dynamics of LS valves have not been well-covered in the literature.Source: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 63, no. 1, Jan. 2017, str. 65-77, SI 9)Type of material - article, component partPublish date - 2017Language - englishCOBISS.SI-ID - 15213339
Author
Hu, Quanyi |
Zhang, Hong, strojnik |
Tian, Shujun |
Qin, Xuxin
Topics
load-sensing |
bond graphs |
modelling |
model reduction |
activity index |
zaznavanje obremenitve |
grafi povezav |
modeliranje |
redukcija modela |
indeks aktivnosti
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source: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 63, no. 1, Jan. 2017, str. 65-77, SI 9)
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Hu, Quanyi | ![]() |
Zhang, Hong, strojnik | ![]() |
Tian, Shujun | ![]() |
Qin, Xuxin | ![]() |
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